Tipping motion for axminster looms



TIPPING MOTION FOR AXMINSTER LOOM;

Filed April 27, 193B Inventor wmiam wfiubert'snn Patented Aug. 15, 1939TIPPING MOTION FOR AXMINSTER LOOMS Application April 27, 1938, SerialNo. 204,637

UNITED STATES PATENT OFFICE 8 Claims.

This invention relates to improvements in tipping motions for Axminsterlooms and it is the gen ral object of the invention to provide means forpreventing the operation of the tipping motion if the tube frame failsto leave the transporting chain.

Axminster looms operate with a series of yarn tube frames which aremoved to transfer position one at a time by transporting chains. Thetube frames are connected to the chain by detachable latches or hookswhich are disconnected when the tube frame is about to move from thechain to cloth forming position. The disconnecting is effected by meansof clutches carried by operating arms or levers, the motion of theclutches being first inward to release the tube frame from the chain andthen downward toward the cloth.

When the tube frame reaches the warp threads it must be given a rollingmotion in order to insert the yarn tubes and the colored yarn projectingfrom them between the warp threads. This rolling motion is made possibleby pivoting the clutch or carrier for the tube frame on the transferarms and imparting angular motion to the clutches by mechanism acting intimed relation with the transfer arms. At the beginning of therolling-in operation the yarn tubes assume a position approaching ahorizontal, after which they are moved downwardly toward a more verticalposition. The rolling of the clutches and tube frame is effected by aforce transmitted through a rod pivoted to the clutches and receivingits driving force from a source independent of that which drives orcontrols the transfer arms. From this it will be seen that if thetransfer arms are held raised by failure of the tube frame to becomedisconnected from the transporting chains, the rods connected to theclutches will be acted on to carry out the rolling operation. Underthese conditions with the tube frame still connected to the transportingchain and therefore unable to move angularly the clutches and tubeframe, together with the operating parts for the clutches, will besubjected to a strain which may bend them and prevent subsequent correctoperation.

It is an important object of my present invention to provide a controlfor the rolling of the tube frame which will prevent transmission of arolling force to the clutches when the transfer arms are raised eventhough the time in the cycle of the loom be reached at which rollingwould ordinarily occur.

It is another object of my present invention to control the clutchrolling mechanism by the transfer arm in such a way that movement of thearm must take place before the actuator for the rolling operation can beconnected to the clutches. The mechanism for accomplishing this resultas set forth hereinafter includes an L- shaped slotted rod head whichreciprocates normally but is out of driving connection with respect tothe clutch due to the raised position of the transferrer arms. When thelatter move down they release the slotted member which then moves intodriving relation with the clutch.

Axminster looms as heretofore made have frequently been provided withthe stopping mechanism shown in Striemer Patent No. 1,546,685 whichoperates to stop the loom when a tube frame sticks to the chains. WhileI contemplate the use of the Striemer motion, it is found, nevertheless,that with increased speeds bending of the tube frame rolling mechanismand its connectors takes place before the Striemer mechanism can stopthe loom.

With these and other objects in view which will appear as thedescription proceeds, my invention resides in the combination andarrangement of parts hereinafter described and set forth.

In the accompanying drawing, wherein a convenient embodiment of myinvention is set forth:

Fig. 1 is an end elevation of the upper part of an AXminster loom havingmy invention applied thereto,

Fig. 2 is a rear elevation taken in the direction of arrow 2, Fig. 1,

Fig. 3 is a view similar to a portion of Fig. 1 but with the tube framein cloth forming position,

Fig. 4 is a detail showing the L-shaped slotted actuator for the tubeframe rolling mechanism, and

Fig. 5 is an enlarged detail front elevation of a clutch and one end ofa tube frame released from the transporting chain, looking in thedirection of arrow 5, Fig. 1.

Referring to the drawing, the loom frame ID supports a cam shaft H whichis geared in wellknown manner to have one revolution for three beats ofthe loom for so-called three-shot Axminster fabric, but the invention tobe set forth hereinafter is not limited to that particular type offabric. In the upper part of the structure there is shown a tipping ortube frame transfer shaft l2 having two arms 13 one of which is shown inFig. 1. This shaft and its arms are operated through a verticalconnector 14 deriving its force from suitable and well-known mechanismnot shown every third beat of the 100m, the effect of the rod being tolower the arms l3 and turn the shaft |2 in a counter-clockwise directionas viewed in Fig. 1 during the tuft forming beat of the loom.

A transfer lever I5 is pivoted as at I6 to each arm I 3 and has a reararm connected to a link |8. The lever l5 also has a front arm l9extending to the left as viewed in Fig. 1 to have pivoted thereto as atone of the two clutches 2| customarily found in Axminster looms. Theclutch is therefore mounted so that it can move toward and from the tubeframe T by rocking of the lever l5 in a horizontal plane around itspivot l6 under action of the well-known links I8. Connected pivotally tothe clutch as at 22 is a rolling rod 23 extending rearwardly from theclutch and connected as at 24 to a rolling arm 25 supported by a tippingor rolling shaft 26.

The matter thus far described, except for modifications to be set forthhereinafter, may be of common construction. The tube frames, one ofwhich is shown in the drawing, are mounted on a transporting chain Cwhich is given a step by step motion to bring the tube frames one at atime to the transfer position shown in Fig. 1. When in this position thetube frames T with the yarn tubes 27 extend downwardly with the yarn Yprojecting therefrom. The yarn spool S supplies the yarn Y and issupported by the tube frame so that it moves with the latter toward thecloth board 28 during the tuft forming beat of the loom. The yarns Ymust be dipped through the warp sheds W in order to form the Axminsterloop, and this dipping is accomplished by angular motion of the clutchrelatively to arm l9. In all essential respects the clutch, tube frame,chain and transfer arms l5 will be of wellknown construction.

The clutch has a rib 28 which overhangs a projection 29 on the tubeframe when the clutch is in the releasing position shown in Fig. 5. Asarm IQ of lever |5 starts down the hook 30 will ordinarily be free fromthe chain C. Should the clutch fail to release the hook, however, due toa defect of the hook or other reason, the rib will rest on theprojection 29 and descent of arm |9 will be arrested. This relation ofthe rib and projection of itself is old, as shown in the Striemerpatent. With the tube frame still connected to the chain and held alsoby the clutch, angular motion of the latter would injure the tube frame.My present invention provides an actuating and controlling mechanism forthe rod 23 to prevent it from transmitting rolling or tipping forces tothe clutches if the arm |9 is raised.

In carrying my invention into effect I extend the arm 25 rearwardly asat and secure therein a pin 4| which projects into a vertical slot 42formed in a rod head 43 adjustably secured to the upper end of avertical actuator rod 45. A second slot 44 extending horizontally fromand communicating with slot 42 is normally horizontally aligned with thepin 4|, while slot 42 is normally aligned vertically with the pin.

The lower end of rod 45 is pivoted as at to a lever 5| movable about afixed pivotal support 52 mounted on the loom frame and carrying a roller53 to engage a cam 54 supported by shaft II. A. spring 55 is connectedbetween the lever 5| and a clip 56 adiustably secured on the rod 45. Theeffect of the spring 55 is to tend to move the rod 45 to the right asviewed in Fig. l for the purpose of placing a lifting shelf 51 on therod head 43 under the pin 4|. Slot 44 permits this shift under theaction of the spring.

The control for the rod head 43 is exercised through the shaft l2 which,as shown in Fig. 1, has a downwardly extending arm into which isthreaded an adjustable pressure screw 6| shown in Fig. 2 as positionedto engage the rear of the rod head 43. Movement of the screw 6| to theleft as viewed in Fig. 1, or forwardly, moves the slot 42 in verticalalignment with the pin 4|, whereas movement of the screw 6| rearwardlyor to the right permits the spring 55 to shift the rod head 43 to theright and place lifting shoulder 51 under the pin 4|.

In normal operation of the loom, the lever 5 will move the clutch to theposition of Fig. 5 to disconnect the tube frame from the chain, afterwhich rod l4 will descend toward cloth forming position indicated inFig. 3. During this descent cam 54 will raise lever 5| to elevate rod45. Downward motion of levers l3 and 5 is accompanied by a motion ofscrew 6| to the right so that spring 55 can move the rod head 43 to theposition shown in Fig. 3. Upward motion of rod 45 therefore rocks lever25 around the axis 25 to move the rod 23 to the left, or forwardly asviewed in Fig. 1, and effect a rocking of the clutch so that the sameassumes the dotted line position shown in Fig. 3. The rod 23 isimmediately thereafter retracted, by the weight of lever 5|, during anupward motion of the lever |5 to cause the tube frame to assume theposition shown in full lines in Fig. 3. The angular motion of the clutchand tube frame around the center 20 is determined by cam 54, and is thewell known wiping-in operation of the tube frame.

If for any reason the tube frame is not unclutched from the chain C thelever l5 will be held up, as will be understood from Fig. 5, and screw6| will hold the rod 43 in such position that the vertical slot 42 isunder pin 4| and motion of rod 45 upwardly will not rock lever 25. Rod23 will therefore not tend to rock the clutch and the parts will not besubjected to any strain. The loom will then be stopped by the Striemerstop motion in common use. Although the weight of lever 5| is reliedupon to move the rod 23 in a right hand direction as viewed in Fig. 1 torestore the clutch to normal vertical position, I do not wishnecessarily to be limited to this mode of operation, inasmuch as theusual means such as a spring not shown can be used to turn the shaft 26in a clockwise direction for the retraction of rod 23, as is customaryin Axminster looms.

From the foregoing it will be seen that I have provided a simple form ofdrive to effect the rolling operations of the clutch 2| and have placedthe drive under control of the shaft |2. If for any reason this shaft isheld raised so as to make angular motion of the clutch 2| undesirable,the rod 45 will be in such a position that it cannot actuate lever 25.If, on the other hand, the tube frame has descended to the positionsshown in Fig. 3, the rod head 43 moves to the right and the liftingshoulder or surface 57 moves under the pin 4| and rollingoperation ofthe clutch can take place.

Having thus described my invention it will Ti be seen that changes andmodifications may be made therein by those skilled in the art withoutdeparting from the spirit and scope of the invention and I do not wishto be limited to the details herein disclosed, but what I claim is:

1. In an Axminster loom having transporting chains carrying a tubeframe, a transfer arm movable from the transporting chains toward thecloth being woven on tuft forming beats of the loom, a tube frameengaging clutch pivoted to the arm, actuating mechanism for the clutchto move the latter angularly with respect to the arm, and a controllerfor the actuator positioned by the transfer arm to prevent the actuatorfrom moving the clutch angularly when the transfer arm fails to move totuft forming position on tuft forming beats of the loom.

2. In an Axminster loom having a transporting chain and a tube framedetachably connected thereto, transfer means to detach the tube framefrom the chain and convey said tube frame to cloth forming position ontuft forming beats of the loom, a pivotal connection between the tubeframe and the transfer means, an operating lever movable about a fixedpivot, a cam to operate the lever positively in one direction,connections between the lever and the tube frame for rocking the sameabout said pivotal connection, said connections including two parts formutual cooperation but normally out of cooperating position, and meansunder control of the transfer means to cause said parts to cooperateprior to movement of the operating lever by the cam.

3. In an Axminster loom having a tube frame to be moved to cloth formingposition on tuft forming beats of the loom, a transporting chain towhich the tube frame is detachably connected, transfer means to detachthe tube frame from the chain and convey said tube frame to clothforming position on tuft forming beats of the loom, mechanism to movethe tube frame angularly with respect to the transfer means on tuftforming beats of the loom, an operating lever movable about a fixedpivot, a cam to actuate said lever positively, and means controlled bythe transfer means to connect the operating lever to said mechanism whenthe transfer means moves the tube frame toward cloth forming position.

4. In an Axminster loom having a transporting chain and a tube framedetachably connected thereto, transfer means to detach the tube framefrom the chainand convey said tube frame to cloth forming position ontuft forming beats of the loom, means to connect the tube frame andtransfer means to prevent the latter from moving to cloth formingposition when the tube frame fails to be detached from the transportingchain on tuft forming beats of the loom, mechanism to give the tubeframe rolling-in movements relatively to the transfer means on tuftforming beats of the loom, an actuator lever for the mechanism movableabout a fixed pivot, means to actuate said lever on tuft forming beatsof the loom, and connections between the actuating lever and themechanism controlled by the transfer means and effective when saidtransfer means moves to cloth forming position to transmit a force fromthe actuating lever to the mechanism and effective when the transfermeans fails to move to cloth forming position on tuft forming beats ofthe loom to prevent a force from being transmitted from the actuatinglever to said mechanism.

5. In an Axminster loom having a transporting chain and a tube framedetachably connected thereto, transfer means to detach the tube framefrom the chain and convey said tube frame to cloth forming position ontuft forming beats of the loom, arresting means to connect the tubeframe and transfer means to prevent the latter from moving to clothforming position when the tube frame fails to be detached from thetransporting chain on tuft forming beats of the loom. mechanism to movethe tube frame angularly relatively to the transfer means on tuftforming beats of the loom, and means controlled by the transfer meansand including a lever movable about a fixed pivot to prevent operationof the mechanism when the transfer means is prevented by the arrestingmeans from moving to cloth forming position.

6. In an Axminster loom having a transporting chain carrying a tubeframe to be detached therefrom on tuft forming beats of the loom,transfer means to disconnect the tube frame from the chain and conveysaid tube frame to cloth forming position on tuft forming beats of theloom, a pivotal connection between the tube frame and the transfermeans, mechanism normally operative to move said tube frame about saidpivotal connection on tuft forming beats of the loom, and meanscontrolled by the transfer means and including a lever movable about afixed pivot to prevent operation of the mechanism when the transfermeans fails to convey the tube frame to cloth forming position on tuftforming beats of the loom.

7. In an Axminster m having transporting chains carrying a tube frame tobe detached therefrom on tuft forming beats of the loom, a transfer armto detach the tube frame from the chains and move with the tube frametoward tuft forming position, a clutch pivoted to the transfer arm toengage the tube frame, a two-part actuator for said clutch one of whichparts moves regularly on tuft forming beats of the loom and the secondof which parts is moved by the first part, means including a levermovable about a fixed pivot to move the first named of said parts, andmeans positioned by the transfer arm to prevent cooperation of saidparts when the transfer arm fails to move toward cloth forming position.

8. In an Axminster loom having a transporting chain, a tube framedetachably connected to the tube frame, transfer means normallyoperative on tuft forming beats of the loom to detach the tube framefrom the transporting chain and convey said tube frame to cloth formingposition, an actuator having an actuating motion on tuft forming beatsof the loom, force transmitting means normally out of the path of theactuator and connected to the tube frame to move the latter angularlywith respect to the transfer means when moved by the actuator, acontroller for the actuator positioned by the transfer means to causesaid actuator to be normally out of the path of said force transmittingmeans when the transfer means is adjacent to the chain, and additionalmeans to move the actuator into operative relation with respect to theforce transmitting means on tuft forming beats of the loom when saidcontroller moves out of controlling position with respect to theactuator due to motion of the transfer means from the transporting chaintoward cloth forming position.

WILLIAM W. ROBERTSON.

